Gerbaldi's theorem

From Wikipedia, the free encyclopedia
Jump to: navigation, search

In linear algebra and projective geometry, Gerbaldi's theorem, proved by Gerbaldi (1882), states that one can find six pairwise apolar linearly independent nondegenerate ternary quadratic forms. These are permuted by the Valentiner group.

References[edit]

  • Gerbaldi, Francesco (1882), "Sui gruppi di sei coniche in involuzione", Torino Atti (in Italian), XVII: 566–580, JFM 14.0537.02